Avery Permanent Shipping Labels with TrueBlock Technology, 5912 Not your basic label. UltraHold permanent adhesive is guaranteed to stick and stay put on cardboard, envelopes, paper, glass or metal. Avery half sheet address labels won't lift, curl or fall off like other brands. Quickly and easily create your own personalized labels. No more jams or smudges with Avery shipping labels. Bright white labels are optimized for laser printers so you can effortlessly print bold bright colors and clear sharp text. Our TrueBlock technology lets you fully cover up everything underneath the 5.5 x 8.5 labels, so you can reuse boxes and block out markings and mistakes for a polished, professional appearance on the bright white labels. This 500 pack of shipping labels is perfect for shipping and mailing jobs, as well as for organizing boxes, labeling bins, classroom organization stickers, and wine bottle labels. These address labels are optimized for laser printers so you can effortlessly print vibrant colors and crisp, clear text without worrying about printer jams or ink smudges. You can also easily customize your printable labels with logos, graphics or images using the free shipping labels template and designs on the Avery site. Permanent adhesive guaranteed to stick and stay put on cardboard, envelopes, paper, glass or metal. No more jams or smudges with Avery shipping labels. White labels optimized for laser printers. TrueBlock technology covers up everything underneath the shipping label so you can reuse boxes. Easily customize these printable labels with thousands of free templates and designs at avery.com/templates. Great for bulk shipping and mailing organizing boxes bin labels classroom organization stickers filing organizing and wine labels.